So i heard that the number of Bitcoin transaction increased double recently.
Where you heard that? It is wrong information. This are number of Bitcoin transactions in last year.
Bitcoin
Jan 2020 9,387,399
Dec 2019 9,430,057
Nov 2019 9,243,776
Oct 2019 9,892,853
Sep 2019 9,798,992
Aug 2019 10,169,294
Jul 2019 10,305,251
Jun 2019 10,486,006
May 2019 11,505,497
Apr 2019 11,003,022
Mar 2019 9,457,625
Feb 2019 9,269,096
You can see that number of transactions is almost identical as a year ago. And is slightly in decrease from May.